Improved material for making boxes



UNITED STATES PATENT OFFICE.

WM. PAINTER, OF BALTIMORE, ASSIGNOR TO HIMSELF AND CHARLES PAINTER, OFOWINGS MILLS, MARYLAND.

IMPROVED MATERIAL FOR MAKING BOXES, 806.

Specification forming part of Letters Patent No. 45,950, dated January17, 1865.

To all whom it may concern:

Be it known that I, WILLIAM PAINTER, of Baltimore, in the county ofBaltimore and State of Maryland, have invented a new and ImprovedAsphaltic Board for Making Boxes, Packages,and other Articles; and I dohereby declare that the following is a full and exact descriptionthereof.

The nature of my invention consists in producing an economicalsubstitute for tin in the manufacture of boxes, packages, and otherarticles by imparting to straw-board, pasteboard, and other similarfibrous material the properties of hardness, stiffness, solidity,elasticity, and imperviousness to oil or water by saturating. the samewith asphaltum or pitch made from coal-tar.

To enable others skilled in the art to make and use my invention, I willproceed to describe its preparation and use.

The substance best adapted to the purpose is the straw-board ofcommerce, the sheets of which are dipped into the melted pitch orasphaltum and allowed to remain a sufficient time for them to becomefully saturated, which requires from eight to ten minutes, according tothe thickness of the sheets. They are then passed between heatedrollers, which remove the superfluous pitch from the surface, leaving itsmooth and finished. 'When cold they become hard, stiff, solid, elastic,and impervious to the action of oil or water, and otherwise qualifiedfor use as an economical and efficient substitute for tin (possessingmost 0t its requisite qualities) for making boxes and packages forblacking, tobacco, paints, axle-grease, concentrated lye, and otherarticles.

In making boxes for blacking the top and bottom are cut in proper formby dies, and each inclosed by a band or rim of tin having a swage orgroove formed for receiving it.

Boxes of cylindrical form are made by cutting the asphaltic board intostrips with beveled edges and bending the same into shape while heatedand pliable, the edges being secured by glue or cement. This forms thebody of the box. The bottom is confined thereto by glue or cement, or bya band of tin or other metal. The top is inclosed by a metallic band, asdescribed, in boxes for blacking. The joint between the bottom and bodyis made tight, when necessary, by glue or cement.

Boxes made of this material and in the manner described are well adaptedfor containing semi-fluid substance.

I am aware that felt and cloth have been saturated with coal-tar forroofing purposes; but I claim the distinctive features produced bysaturating sheets of straw-board or pasteboard with asphaltum or pitchmade from coal-tar, which becomes hard when cold, adapt-- ing thematerial to the purposes described.

What I claim as my invention, and desire to secure by Letters Patent, is

As a new article of manufacture, the as phaltic board, madesubstantially as described, for the manufacture of boxes, packages, andother articles.

WILLIAM PAINTER.

Witnesses WM. P. HooPEs, D. A. HooPEs.

